ACAB, or A.C.A.B. = All Coppers Are Bastards.\r\n\r\nOriginated way before the punk & Oi appropriation of the abbreviation. References to it go back to the 1940s in the UK. Often as a tattoo on those who've had unpleasant dealings with the British police.\n> ACAB tattoo across the hands/fingers/knuckles.\n> Occasionally seen as tattoo on the forehead during the punk/Oi era.\n